Cut off the daytime running lights..From what I can remember you don't need a license key unless you are doing advanced stuff like programming keys or changing the computer. Also you can get the free limited license for 2 months at a time by emailing them why you need it.
I think they said they do this to help prevent people from using the program for bad things, and to keep new users away from things that might ruin their car.
What are you trying to do with FORSCAN?
Depending on the year it might not be a option, I had to wire a relay to my headlight switch and than cut the wire leading to the smart junction box (interior fuse panel) and bypass the DRL that way.Cut off the daytime running lights..